Group Data Cheat Sheet

Group data into rows with the same value of Species.

dplyr::group_by(iris, Species)

Remove grouping information from a data frame.

dplyr::ungroup(iris)

Compute separate summary rows for each group.

iris %>% group_by(Species) %>% summarise(…)

Compute new variables by group

iris %>% group_by(Species) %>% mutate(…)